rounding fix + color display + refactor

src/main/java/org/solovyev/android/calculator/CalculatorDisplay.java

@@ -6,8 +6,14 @@
 package org.solovyev.android.calculator;
 
 import android.content.Context;
+import android.graphics.Color;
+import android.text.Html;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.widget.TextView;
+import org.jetbrains.annotations.NotNull;
+import org.solovyev.android.calculator.model.ParseException;
+import org.solovyev.android.calculator.model.TextProcessor;
 
 /**
  * User: serso
@@ -18,6 +24,9 @@ public class CalculatorDisplay extends TextView {
 
 	private boolean valid = true;
 
+	@NotNull
+	private final static TextProcessor<String> textHighlighter = new TextHighlighter(Color.WHITE);
+
 	public CalculatorDisplay(Context context) {
 		super(context);
 	}
@@ -44,4 +53,22 @@ public class CalculatorDisplay extends TextView {
 
 		setValid(true);
 	}
+
+	public synchronized void redraw() {
+		if (isValid()) {
+			String text = getText().toString();
+
+			Log.d(this.getClass().getName(), text);
+
+			try {
+				text = textHighlighter.process(text);
+			} catch (ParseException e) {
+				Log.e(this.getClass().getName(), e.getMessage(), e);
+			}
+
+			Log.d(this.getClass().getName(), text);
+			super.setText(Html.fromHtml(text), BufferType.EDITABLE);
+		}
+	}
+
 }

src/main/java/org/solovyev/android/calculator/CalculatorModel.java

@@ -171,19 +171,20 @@ public enum CalculatorModel implements CursorControl, HistoryControl<CalculatorH
 	}
 
 	private void evaluate(@Nullable final String expression) {
-		final CalculatorDisplay localDisplay = display;
 		if (!StringUtils.isEmpty(expression)) {
 			try {
 				Log.d(CalculatorModel.class.getName(), "Trying to evaluate: " + expression /*+ StringUtils.fromStackTrace(Thread.currentThread().getStackTrace())*/);
-				localDisplay.setText(calculatorEngine.evaluate(JsclOperation.numeric, expression));
+				display.setText(calculatorEngine.evaluate(JsclOperation.numeric, expression));
 			} catch (EvalError e) {
-				handleEvaluationException(expression, localDisplay, e);
+				handleEvaluationException(expression, display, e);
 			} catch (ParseException e) {
-				handleEvaluationException(expression, localDisplay, e);
+				handleEvaluationException(expression, display, e);
 			}
 		} else {
-			localDisplay.setText("");
+			this.display.setText("");
 		}
+
+		this.display.redraw();
 	}
 
 	private void handleEvaluationException(@NotNull String expression, @NotNull CalculatorDisplay localDisplay, @NotNull Exception e) {
@@ -212,15 +213,19 @@ public enum CalculatorModel implements CursorControl, HistoryControl<CalculatorH
 					final MathType.Result mathType = MathType.getType(text, 0);
 
 					int cursorPositionOffset = 0;
+
 					final StringBuilder textToBeInserted = new StringBuilder(text);
 					switch (mathType.getMathType()) {
 						case function:
 							textToBeInserted.append("()");
 							cursorPositionOffset = -1;
 							break;
-						case group_symbols:
+					}
+
+					if (cursorPositionOffset == 0) {
+						if ( MathType.openGroupSymbols.contains(text) ) {
 							cursorPositionOffset = -1;
-							break;
+						}
 					}
 
 					editor.getText().insert(editor.getSelectionStart(), textToBeInserted.toString());
@@ -256,6 +261,7 @@ public enum CalculatorModel implements CursorControl, HistoryControl<CalculatorH
 			setValuesFromHistory(this.display, editorHistoryState.getDisplayState());
 
 			editor.redraw();
+			display.redraw();
 		}
 	}
 

src/main/java/org/solovyev/android/calculator/TextHighlighter.java

@@ -97,15 +97,15 @@ public class TextHighlighter implements TextProcessor<String> {
 		for (; i < s.length(); i++) {
 			char ch = s.charAt(i);
 
-			if (MathType.openGroupSymbols.contains(ch)) {
+			if (MathType.open_group_symbol.getTokens().contains(String.valueOf(ch))) {
 				result.append(ch);
 				result.append("</font>");
 				i = processBracketGroup(result, s, i + 1, numberOfOpenings + 1, maxNumberOfGroups);
 				result.append("<font color=\"").append(getColor(maxNumberOfGroups, numberOfOpenings)).append("\">");
-				if (i < s.length() && MathType.closeGroupSymbols.contains(s.charAt(i))) {
+				if (i < s.length() && MathType.close_group_symbol.getTokens().contains(String.valueOf(s.charAt(i)))) {
 					result.append(s.charAt(i));
 				}
-			} else if (MathType.closeGroupSymbols.contains(ch)) {
+			} else if (MathType.close_group_symbol.getTokens().contains(String.valueOf(ch))) {
 				break;
 			} else {
 				result.append(ch);

src/main/java/org/solovyev/android/calculator/jscl/FromJsclNumericTextProcessor.java

@@ -7,12 +7,14 @@
 package org.solovyev.android.calculator.jscl;
 
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.math.MathType;
 import org.solovyev.android.calculator.model.CalculatorEngine;
 import org.solovyev.android.calculator.model.ParseException;
 import org.solovyev.android.calculator.model.TextProcessor;
-import org.solovyev.common.utils.MathUtils;
+
-import org.solovyev.util.math.Complex;
+import java.math.BigDecimal;
+import java.text.DecimalFormat;
 
 /**
  * User: serso
@@ -25,11 +27,12 @@ class FromJsclNumericTextProcessor implements TextProcessor<String> {
 	@Override
 	public String process(@NotNull String result) throws ParseException {
 		try {
-			final Double roundedValue = round(result);
+			final Double doubleValue = Double.valueOf(result);
-			if ( roundedValue.isInfinite() ) {
+
+			if (doubleValue.isInfinite()) {
 				result = MathType.INFINITY;
 			} else {
-				result = String.valueOf(roundedValue);
+				result = format(doubleValue);
 			}
 		} catch (NumberFormatException e) {
 			result = result.replace(MathType.INFINITY_JSCL, MathType.INFINITY);
@@ -49,6 +52,21 @@ class FromJsclNumericTextProcessor implements TextProcessor<String> {
 		return result;
 	}
 
+	private String format(@NotNull String value) {
+		return format(Double.valueOf(value));
+	}
+
+	private String format(@NotNull Double value) {
+		if (!value.isInfinite() && !value.isNaN()) {
+			final DecimalFormat df = new DecimalFormat();
+			df.setGroupingUsed(false);
+			df.setMaximumFractionDigits(CalculatorEngine.instance.getPrecision());
+			return df.format(new BigDecimal(value).setScale(CalculatorEngine.instance.getPrecision(), BigDecimal.ROUND_HALF_UP).doubleValue());
+		} else {
+			return String.valueOf(value);
+		}
+	}
+
 	protected String createResultForComplexNumber(@NotNull final String s) {
 		final Complex complex = new Complex();
 
@@ -56,13 +74,13 @@ class FromJsclNumericTextProcessor implements TextProcessor<String> {
 		// may be it's just complex number
 		int plusIndex = s.lastIndexOf("+");
 		if (plusIndex >= 0) {
-			complex.setReal(round(s.substring(0, plusIndex)));
+			complex.setReal(format(s.substring(0, plusIndex)));
 			result += complex.getReal();
 			result += "+";
 		} else {
 			plusIndex = s.lastIndexOf("-");
 			if (plusIndex >= 0) {
-				complex.setReal(round(s.substring(0, plusIndex)));
+				complex.setReal(format(s.substring(0, plusIndex)));
 				result += complex.getReal();
 				result += "-";
 			}
@@ -71,7 +89,7 @@ class FromJsclNumericTextProcessor implements TextProcessor<String> {
 
 		int multiplyIndex = s.indexOf("*");
 		if (multiplyIndex >= 0) {
-			complex.setImaginary(round(s.substring(plusIndex >= 0 ? plusIndex + 1 : 0, multiplyIndex)));
+			complex.setImaginary(format(s.substring(plusIndex >= 0 ? plusIndex + 1 : 0, multiplyIndex)));
 			result += complex.getImaginary();
 
 		}
@@ -81,8 +99,31 @@ class FromJsclNumericTextProcessor implements TextProcessor<String> {
 		return result;
 	}
 
-	private Double round(@NotNull String result) {
+	private class Complex {
-		final Double dResult = Double.valueOf(result);
+
-		return MathUtils.round(dResult, CalculatorEngine.instance.getNumberOfFractionDigits());
+		@Nullable
+		private String real;
+
+		@Nullable
+		private String imaginary;
+
+		@Nullable
+		public String getReal() {
+			return real;
+		}
+
+		public void setReal(@Nullable String real) {
+			this.real = real;
+		}
+
+		@Nullable
+		public String getImaginary() {
+			return imaginary;
+		}
+
+		public void setImaginary(@Nullable String imaginary) {
+			this.imaginary = imaginary;
 		}
 	}
+
+}

src/main/java/org/solovyev/android/calculator/math/Functions.java

@@ -49,8 +49,8 @@ public class Functions {
 		allPrefix = functions;
 	}
 
-	public final static Character FACT = '!';
+	public final static String FACT = "!";
-	public final static Character DEGREE = '°';
+	public final static String DEGREE = "°";
 
-	public static final List<Character> allPostfix = Arrays.asList(FACT, DEGREE);
+	public static final List<String> allPostfix = Arrays.asList(FACT, DEGREE);
 }

src/main/java/org/solovyev/android/calculator/math/MathType.java

@@ -9,60 +9,119 @@ import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.calculator.CharacterAtPositionFinder;
 import org.solovyev.android.calculator.StartsWithFinder;
 import org.solovyev.android.calculator.model.CalculatorEngine;
+import org.solovyev.common.utils.CollectionsUtils;
 import org.solovyev.common.utils.Finder;
 
-import java.util.Arrays;
+import java.util.*;
-import java.util.List;
 
 import static org.solovyev.common.utils.CollectionsUtils.get;
 
 public enum MathType {
 
-	digit,
+	digit(100, true, true, "0", "1", "2", "3", "4", "5", "6", "7", "8", "9") {
-	dot,
+		@Override
-	power_10,
+		public boolean isNeedMultiplicationSignBefore(@NotNull MathType mathTypeBefore) {
-	constant,
+			return super.isNeedMultiplicationSignBefore(mathTypeBefore) && mathTypeBefore != digit && mathTypeBefore != dot;
-	function,
+		}
-	postfix_function,
+	},
-	unary_operation,
+
-	binary_operation,
+	dot(200, true, true, "."){
-	group_symbols,
+		@Override
-	open_group_symbol,
+		public boolean isNeedMultiplicationSignBefore(@NotNull MathType mathTypeBefore) {
-	close_group_symbol,
+			return super.isNeedMultiplicationSignBefore(mathTypeBefore) && mathTypeBefore != digit;
-	text;
+		}
+	},
+
+	power_10(300, true, false, "E"),
+
+	postfix_function(400, true, false, Functions.allPostfix),
+	unary_operation(500, false, false, "-", "=", "!"),
+	binary_operation(600, false, false, "-", "+", "*", "×", "∙", "/", "^"),
+	open_group_symbol(800, true, false, "[", "(", "{") {
+		@Override
+		public boolean isNeedMultiplicationSignBefore(@NotNull MathType mathTypeBefore) {
+			return super.isNeedMultiplicationSignBefore(mathTypeBefore) && mathTypeBefore != function;
+		}
+	},
+	close_group_symbol(900, false, true, "]", ")", "}") {
+		@Override
+		public boolean isNeedMultiplicationSignBefore(@NotNull MathType mathTypeBefore) {
+			return false;
+		}
+	},
+	function(1000, true, true, Functions.allPrefix),
+	constant(1100, true, true) {
+		@NotNull
+		@Override
+		public List<String> getTokens() {
+			return CalculatorEngine.instance.getVarsRegister().getVarNames();
+		}
+	},
+
+	text(1200, false, false);
+
+	@NotNull
+	private final List<String> tokens;
+
+	@NotNull
+	private final Integer priority;
+
+	private final boolean needMultiplicationSignBefore;
+
+	private final boolean needMultiplicationSignAfter;
+
+	MathType(@NotNull Integer priority,
+			 boolean needMultiplicationSignBefore,
+			 boolean needMultiplicationSignAfter,
+			 @NotNull String... tokens) {
+		this(priority, needMultiplicationSignBefore, needMultiplicationSignAfter, CollectionsUtils.asList(tokens));
+	}
+
+	MathType(@NotNull Integer priority,
+			 boolean needMultiplicationSignBefore,
+			 boolean needMultiplicationSignAfter,
+			 @NotNull List<String> tokens) {
+		this.priority = priority;
+		this.needMultiplicationSignBefore = needMultiplicationSignBefore;
+		this.needMultiplicationSignAfter = needMultiplicationSignAfter;
+		this.tokens = Collections.unmodifiableList(tokens);
+	}
+
+	@NotNull
+	public List<String> getTokens() {
+		return tokens;
+	}
+
+	private boolean isNeedMultiplicationSignBefore() {
+		return needMultiplicationSignBefore;
+	}
+
+	private boolean isNeedMultiplicationSignAfter() {
+		return needMultiplicationSignAfter;
+	}
+
+	public boolean isNeedMultiplicationSignBefore(@NotNull MathType mathTypeBefore) {
+		return needMultiplicationSignBefore && mathTypeBefore.isNeedMultiplicationSignAfter();
+	}
+
+
+	public static final List<String> openGroupSymbols = Arrays.asList("[]", "()", "{}");
 
 	public final static Character POWER_10 = 'E';
 	public final static String POWER_10_JSCL = "10^";
 
 	public static final String IMAGINARY_NUMBER = "i";
 	public static final String IMAGINARY_NUMBER_JSCL = "sqrt(-1)";
+
 	public static final String PI = "π";
 	public static final String E = "e";
 	public final static String NAN = "NaN";
+
 	public final static String INFINITY = "∞";
 	public final static String INFINITY_JSCL = "Infinity";
 
 	public static final List<String> constants = Arrays.asList(E, PI, IMAGINARY_NUMBER, NAN, INFINITY);
 
-	public static final List<String> digits = Arrays.asList("0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
-
-	public static final List<Character> dots = Arrays.asList('.');
-
-
-	public static final List<Character> unaryOperations = Arrays.asList('-', '=', '!');
-
-	public static final List<Character> binaryOperations = Arrays.asList('-', '+', '*', '×', '∙', '/', '^');
-
-	public static final List<String> prefixFunctions = Functions.allPrefix;
-
-	public static final List<Character> postfixFunctions = Functions.allPostfix;
-
-	public static final List<String> groupSymbols = Arrays.asList("[]", "()", "{}");
-
-	public static final List<Character> openGroupSymbols = Arrays.asList('[', '(', '{');
-
-	public static final List<Character> closeGroupSymbols = Arrays.asList(']', ')', '}');
-
 	/**
 	 * Method determines mathematical entity type for text substring starting from ith index
 	 *
@@ -80,67 +139,39 @@ public enum MathType {
 			return new Result(MathType.text, text);
 		}
 
-		final StartsWithFinder stringStartWithFinder = new StartsWithFinder(text, i);
+		final StartsWithFinder startsWithFinder = new StartsWithFinder(text, i);
-		final CharacterAtPositionFinder characterStartWithFinder = new CharacterAtPositionFinder(text, i);
 
-		String foundString = get(digits, stringStartWithFinder);
+		for (MathType mathType : getMathTypesByPriority()) {
-		if (foundString != null) {
+			final String s = get(mathType.getTokens(), startsWithFinder);
-			return new Result(MathType.digit, foundString);
+			if ( s != null ) {
+				return new Result(mathType, s);
 			}
-
-		Character foundCharacter = get(dots, characterStartWithFinder);
-		if (foundCharacter != null) {
-			return new Result(dot, String.valueOf(foundCharacter));
-		}
-
-		foundCharacter = characterStartWithFinder.isFound(POWER_10) ? POWER_10 : null;
-		if (foundCharacter != null) {
-			return new Result(power_10, String.valueOf(foundCharacter));
-		}
-
-		foundCharacter = get(postfixFunctions, characterStartWithFinder);
-		if (foundCharacter != null) {
-			return new Result(postfix_function, String.valueOf(foundCharacter));
-		}
-
-		foundCharacter = get(unaryOperations, characterStartWithFinder);
-		if (foundCharacter != null) {
-			return new Result(unary_operation, String.valueOf(foundCharacter));
-		}
-
-		foundCharacter = get(binaryOperations, characterStartWithFinder);
-		if (foundCharacter != null) {
-			return new Result(binary_operation, String.valueOf(foundCharacter));
-		}
-
-		foundString = get(groupSymbols, stringStartWithFinder);
-		if (foundString != null) {
-			return new Result(MathType.group_symbols, foundString);
-		}
-
-		foundCharacter = get(openGroupSymbols, characterStartWithFinder);
-		if (foundCharacter != null) {
-			return new Result(open_group_symbol, String.valueOf(foundCharacter));
-		}
-
-		foundCharacter = get(closeGroupSymbols, characterStartWithFinder);
-		if (foundCharacter != null) {
-			return new Result(close_group_symbol, String.valueOf(foundCharacter));
-		}
-
-		foundString = get(prefixFunctions, stringStartWithFinder);
-		if (foundString != null) {
-			return new Result(MathType.function, foundString);
-		}
-
-		foundString = get(CalculatorEngine.instance.getVarsRegister().getVarNames(), stringStartWithFinder);
-		if (foundString != null) {
-			return new Result(MathType.constant, foundString);
 		}
 
 		return new Result(MathType.text, text.substring(i));
 	}
 
+
+	private static List<MathType> mathTypesByPriority;
+
+	@NotNull
+	private static List<MathType> getMathTypesByPriority() {
+		if ( mathTypesByPriority == null ) {
+			final List<MathType> result = CollectionsUtils.asList(MathType.values());
+
+			Collections.sort(result, new Comparator<MathType>() {
+				@Override
+				public int compare(MathType l, MathType r) {
+					return l.priority.compareTo(r.priority);
+				}
+			});
+
+			mathTypesByPriority = result;
+		}
+
+		return mathTypesByPriority;
+	}
+
 	public static class Result {
 
 		@NotNull

src/main/java/org/solovyev/android/calculator/model/CalculatorEngine.java

@@ -39,7 +39,7 @@ public enum CalculatorEngine {
 	@NotNull
 	private final Object lock = new Object();
 
-	private int numberOfFractionDigits = 5;
+	private int precision = 5;
 
 	@NotNull
 	public final TextProcessor<PreparedExpression> preprocessor = new ToJsclTextProcessor();
@@ -85,12 +85,12 @@ public enum CalculatorEngine {
 		}
 	}
 
-	public int getNumberOfFractionDigits() {
+	public int getPrecision() {
-		return numberOfFractionDigits;
+		return precision;
 	}
 
-	public void setNumberOfFractionDigits(int numberOfFractionDigits) {
+	public void setPrecision(int precision) {
-		this.numberOfFractionDigits = numberOfFractionDigits;
+		this.precision = precision;
 	}
 
 	public void init(@Nullable Context context, @Nullable SharedPreferences preferences) throws EvalError {
@@ -105,7 +105,7 @@ public enum CalculatorEngine {
 			if (preferences != null) {
 				final NumberMapper<Integer> integerNumberMapper = new NumberMapper<Integer>(Integer.class);
 				//noinspection ConstantConditions
-				this.setNumberOfFractionDigits(integerNumberMapper.parseValue(preferences.getString(RESULT_PRECISION_P_KEY, RESULT_PRECISION_DEFAULT)));
+				this.setPrecision(integerNumberMapper.parseValue(preferences.getString(RESULT_PRECISION_P_KEY, RESULT_PRECISION_DEFAULT)));
 			}
 
 			varsRegister.init(context, preferences);

src/main/java/org/solovyev/android/calculator/model/ToJsclTextProcessor.java

@@ -50,7 +50,7 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 
 				// NOTE: fix for jscl for EMPTY functions processing (see tests)
 				startsWithFinder.setI(i + 1);
-				if ( i < s.length() && CollectionsUtils.get(MathType.groupSymbols, startsWithFinder) != null) {
+				if ( i < s.length() && CollectionsUtils.get(MathType.openGroupSymbols, startsWithFinder) != null) {
 					throw new ParseException("Empty function: " + mathTypeResult.getMatch());
 					/*i += 2;
 					sb.append("(" + SPECIAL_STRING + ")");
@@ -78,7 +78,7 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 			startsWithFinder.setI(i);
 
 			int offset = 0;
-			String functionName = CollectionsUtils.get(MathType.prefixFunctions, startsWithFinder);
+			String functionName = CollectionsUtils.get(MathType.function.getTokens(), startsWithFinder);
 			if (functionName == null) {
 				String varName = CollectionsUtils.get(CalculatorEngine.instance.getVarsRegister().getVarNames(), startsWithFinder);
 				if (varName != null) {
@@ -114,7 +114,7 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 		for (Var var : CalculatorEngine.instance.getVarsRegister().getVars()) {
 			if (!var.isSystem()) {
 				if (s.startsWith(var.getName(), i)) {
-					if (CollectionsUtils.get(MathType.prefixFunctions, startsWithFinder) == null) {
+					if (CollectionsUtils.get(MathType.function.getTokens(), startsWithFinder) == null) {
 					}
 				}
 			}
@@ -149,7 +149,7 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 			if (i > 0) {
 				final EndsWithFinder endsWithFinder = new EndsWithFinder(s);
 				endsWithFinder.setI(i + 1);
-				if (!CollectionsUtils.contains(MathType.prefixFunctions, FilterType.included, endsWithFinder)) {
+				if (!CollectionsUtils.contains(MathType.function.getTokens(), FilterType.included, endsWithFinder)) {
 					MathType type = MathType.getType(s, i).getMathType();
 					if (type != MathType.constant) {
 						return true;
@@ -204,36 +204,16 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 																		 @NotNull String s,
 																		 int i,
 																		 @Nullable MathType.Result mathTypeBeforeResult) {
-		MathType.Result result = MathType.getType(s, i);
+		final MathType.Result result = MathType.getType(s, i);
 
 		if (i > 0) {
 
-			final MathType mathType = result.getMathType();
+			final MathType current = result.getMathType();
 			assert mathTypeBeforeResult != null;
-			final MathType mathTypeBefore = mathTypeBeforeResult.getMathType();
+			final MathType before = mathTypeBeforeResult.getMathType();
 
-			if (mathTypeBefore == MathType.constant || (mathTypeBefore != MathType.binary_operation &&
+			if (current.isNeedMultiplicationSignBefore(before)) {
-					mathTypeBefore != MathType.unary_operation &&
-					mathTypeBefore != MathType.power_10 &&
-					mathTypeBefore != MathType.function &&
-					mathTypeBefore != MathType.open_group_symbol)) {
-
-				if (mathType == MathType.constant) {
 				sb.append("*");
-				} else if (mathType == MathType.power_10) {
-					sb.append("*");
-				} else if (mathType == MathType.open_group_symbol && mathTypeBefore != null) {
-					sb.append("*");
-				} else if (mathType == MathType.digit && ((mathTypeBefore != MathType.digit && mathTypeBefore != MathType.dot) || mathTypeBefore == MathType.constant)) {
-					sb.append("*");
-				} else {
-					for (String function : MathType.prefixFunctions) {
-						if (s.startsWith(function, i)) {
-							sb.append("*");
-							break;
-						}
-					}
-				}
 			}
 		}
 

src/test/java/org/solovyev/android/calculator/model/CalculatorEngineTest.java

@@ -9,7 +9,6 @@ import bsh.EvalError;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
-import org.simpleframework.xml.Attribute;
 import org.solovyev.android.calculator.jscl.JsclOperation;
 
 /**
@@ -28,27 +27,52 @@ public class CalculatorEngineTest {
 	public void testEvaluate() throws Exception {
 		final CalculatorEngine cm = CalculatorEngine.instance;
 
-		Assert.assertEquals("4.0", cm.evaluate(JsclOperation.numeric, "2+2"));
+		Assert.assertEquals("4", cm.evaluate(JsclOperation.numeric, "2+2"));
-		Assert.assertEquals("-0.7568", cm.evaluate(JsclOperation.numeric, "sin(4)"));
+		Assert.assertEquals("-0.757", cm.evaluate(JsclOperation.numeric, "sin(4)"));
-		Assert.assertEquals("0.5236", cm.evaluate(JsclOperation.numeric, "asin(0.5)"));
+		Assert.assertEquals("0.524", cm.evaluate(JsclOperation.numeric, "asin(0.5)"));
-		Assert.assertEquals("-0.39626", cm.evaluate(JsclOperation.numeric, "sin(4)asin(0.5)"));
+		Assert.assertEquals("-0.396", cm.evaluate(JsclOperation.numeric, "sin(4)asin(0.5)"));
-		Assert.assertEquals("-0.5604", cm.evaluate(JsclOperation.numeric, "sin(4)asin(0.5)sqrt(2)"));
+		Assert.assertEquals("-0.56", cm.evaluate(JsclOperation.numeric, "sin(4)asin(0.5)sqrt(2)"));
-		Assert.assertEquals("-0.5604", cm.evaluate(JsclOperation.numeric, "sin(4)asin(0.5)√(2)"));
+		Assert.assertEquals("-0.56", cm.evaluate(JsclOperation.numeric, "sin(4)asin(0.5)√(2)"));
-		Assert.assertEquals("7.38906", cm.evaluate(JsclOperation.numeric, "e^2"));
+		Assert.assertEquals("7.389", cm.evaluate(JsclOperation.numeric, "e^2"));
-		Assert.assertEquals("7.38906", cm.evaluate(JsclOperation.numeric, "exp(1)^2"));
+		Assert.assertEquals("7.389", cm.evaluate(JsclOperation.numeric, "exp(1)^2"));
-		Assert.assertEquals("7.38906", cm.evaluate(JsclOperation.numeric, "exp(2)"));
+		Assert.assertEquals("7.389", cm.evaluate(JsclOperation.numeric, "exp(2)"));
-		Assert.assertEquals("2.0+i", cm.evaluate(JsclOperation.numeric, "2*1+sqrt(-1)"));
+		Assert.assertEquals("2+i", cm.evaluate(JsclOperation.numeric, "2*1+sqrt(-1)"));
-		Assert.assertEquals("0.92054+3.14159i", cm.evaluate(JsclOperation.numeric, "ln(5cosh(38π√(2cos(2))))"));
+		Assert.assertEquals("0.921+3.142i", cm.evaluate(JsclOperation.numeric, "ln(5cosh(38π√(2cos(2))))"));
-		Assert.assertEquals("7.38906i", cm.evaluate(JsclOperation.numeric, "iexp(2)"));
+		Assert.assertEquals("7.389i", cm.evaluate(JsclOperation.numeric, "iexp(2)"));
-		Assert.assertEquals("2.0+7.38906i", cm.evaluate(JsclOperation.numeric, "2+iexp(2)"));
+		Assert.assertEquals("2+7.389i", cm.evaluate(JsclOperation.numeric, "2+iexp(2)"));
-		Assert.assertEquals("2.0+7.38906i", cm.evaluate(JsclOperation.numeric, "2+√(-1)exp(2)"));
+		Assert.assertEquals("2+7.389i", cm.evaluate(JsclOperation.numeric, "2+√(-1)exp(2)"));
-		Assert.assertEquals("2.0-2.5i", cm.evaluate(JsclOperation.numeric, "2-2.5i"));
+		Assert.assertEquals("2-2.5i", cm.evaluate(JsclOperation.numeric, "2-2.5i"));
-		Assert.assertEquals("-2.0-2.5i", cm.evaluate(JsclOperation.numeric, "-2-2.5i"));
+		Assert.assertEquals("-2-2.5i", cm.evaluate(JsclOperation.numeric, "-2-2.5i"));
-		Assert.assertEquals("-2.0+2.5i", cm.evaluate(JsclOperation.numeric, "-2+2.5i"));
+		Assert.assertEquals("-2+2.5i", cm.evaluate(JsclOperation.numeric, "-2+2.5i"));
-		Assert.assertEquals("-2.0+2.1i", cm.evaluate(JsclOperation.numeric, "-2+2.1i"));
+		Assert.assertEquals("-2+2.1i", cm.evaluate(JsclOperation.numeric, "-2+2.1i"));
-		Assert.assertEquals("-3.41007+3.41007i", cm.evaluate(JsclOperation.numeric, "(5tan(2i)+2i)/(1-i)"));
+		Assert.assertEquals("-3.41+3.41i", cm.evaluate(JsclOperation.numeric, "(5tan(2i)+2i)/(1-i)"));
 		Assert.assertEquals("-0.1-0.2i", cm.evaluate(JsclOperation.numeric, "(1-i)/(2+6i)"));
 
+		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("si", 5d));
+
+		Assert.assertEquals("-0.959", cm.evaluate(JsclOperation.numeric, "sin(5)"));
+		Assert.assertEquals("-4.795", cm.evaluate(JsclOperation.numeric, "sin(5)si"));
+		Assert.assertEquals("-23.973", cm.evaluate(JsclOperation.numeric, "sisin(5)si"));
+		Assert.assertEquals("-23.973", cm.evaluate(JsclOperation.numeric, "si*sin(5)si"));
+		Assert.assertEquals("-3.309", cm.evaluate(JsclOperation.numeric, "sisin(5si)si"));
+
+		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("s", 1d));
+		Assert.assertEquals("5", cm.evaluate(JsclOperation.numeric, "si"));
+
+		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("k", 3.5d));
+		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("k1", 4d));
+		Assert.assertEquals("4", cm.evaluate(JsclOperation.numeric, "k11"));
+
+		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("t", (String)null));
+		Assert.assertEquals("11×t", cm.evaluate(JsclOperation.numeric, "t11"));
+		Assert.assertEquals("11×e×t", cm.evaluate(JsclOperation.numeric, "t11e"));
+		Assert.assertEquals("11×Infinity×t", cm.evaluate(JsclOperation.numeric, "t11∞"));
+		Assert.assertEquals("-t+t^3", cm.evaluate(JsclOperation.numeric, "t(t-1)(t+1)"));
+	}
+
+	@Test
+	public void testEmptyFunction() throws Exception {
+		final CalculatorEngine cm = CalculatorEngine.instance;
 		try {
 			cm.evaluate(JsclOperation.numeric, "cos(cos(cos(cos(acos(acos(acos(acos(acos(acos(acos(acos(cos(cos(cos(cos(cosh(acos(cos(cos(cos(cos(cos(acos(acos(acos(acos(acos(acos(acos(acos(cos(cos(cos(cos(cosh(acos(cos())))))))))))))))))))))))))))))))))))))");
 			Assert.fail();
@@ -60,78 +84,28 @@ public class CalculatorEngineTest {
 			Assert.fail();
 		} catch (ParseException e){
 		}
-		Assert.assertEquals("0.73909", cm.evaluate(JsclOperation.numeric, "cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(1))))))))))))))))))))))))))))))))))))"));
+		Assert.assertEquals("0.739", cm.evaluate(JsclOperation.numeric, "cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(cos(1))))))))))))))))))))))))))))))))))))"));
 
 		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("si", 5d));
-		Assert.assertEquals("5.0", cm.evaluate(JsclOperation.numeric, "si"));
+		Assert.assertEquals("5", cm.evaluate(JsclOperation.numeric, "si"));
 		try {
 			cm.evaluate(JsclOperation.numeric, "sin");
 			Assert.fail();
 		} catch (EvalError e) {
 		}
-		Assert.assertEquals("-0.95892", cm.evaluate(JsclOperation.numeric, "sin(5)"));
-		Assert.assertEquals("-4.79462", cm.evaluate(JsclOperation.numeric, "sin(5)si"));
-		Assert.assertEquals("-23.97311", cm.evaluate(JsclOperation.numeric, "sisin(5)si"));
-		Assert.assertEquals("-23.97311", cm.evaluate(JsclOperation.numeric, "si*sin(5)si"));
-		Assert.assertEquals("-3.30879", cm.evaluate(JsclOperation.numeric, "sisin(5si)si"));
-
-		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("s", 1d));
-		Assert.assertEquals("5.0", cm.evaluate(JsclOperation.numeric, "si"));
-
-		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("k", 3.5d));
-		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("k1", 4d));
-		Assert.assertEquals("4.0", cm.evaluate(JsclOperation.numeric, "k11"));
-
-		CalculatorEngine.instance.getVarsRegister().addVar(null, new Var.Builder("t", (String)null));
-		Assert.assertEquals("11*t", cm.evaluate(JsclOperation.numeric, "t11"));
-		Assert.assertEquals("11*2.718281828459045*t", cm.evaluate(JsclOperation.numeric, "t11e"));
-		Assert.assertEquals("11*Infinity*t", cm.evaluate(JsclOperation.numeric, "t11∞"));
-		Assert.assertEquals("-t+t^3", cm.evaluate(JsclOperation.numeric, "t(t-1)(t+1)"));
 	}
 
-	public interface TestInterface {
+	@Test
-		Integer getField();
+	public void testRounding() throws Exception {
-	}
+		final CalculatorEngine cm = CalculatorEngine.instance;
 
-	public class TestClass implements TestInterface{
+		cm.setPrecision(2);
+		Assert.assertEquals("12345678.9", cm.evaluate(JsclOperation.numeric, "1.23456789E7"));
+		cm.setPrecision(10);
+		Assert.assertEquals("12345678.9", cm.evaluate(JsclOperation.numeric, "1.23456789E7"));
+		Assert.assertEquals("123456789", cm.evaluate(JsclOperation.numeric, "1.234567890E8"));
+		Assert.assertEquals("1234567890.1", cm.evaluate(JsclOperation.numeric, "1.2345678901E9"));
 
-		@Attribute(required = true)
-		private Integer field;
 
-		public TestClass() {
-		}
-
-		public TestClass(Integer field) {
-			this.field = field;
-		}
-
-		public Integer getField() {
-			return field;
-		}
-
-		public void setField(Integer field) {
-			this.field = field;
-		}
-	}
-
-	public class NewTestClass implements TestInterface{
-
-		@Attribute
-		private Integer field;
-
-		public NewTestClass() {
-		}
-
-		public NewTestClass(Integer field) {
-			this.field = field;
-		}
-
-		public Integer getField() {
-			return field;
-		}
-
-		public void setField(Integer field) {
-			this.field = field;
-		}
 	}
 }

src/test/java/org/solovyev/android/calculator/model/ToJsclTextProcessorTest.java

@@ -9,7 +9,6 @@ package org.solovyev.android.calculator.model;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
-import org.solovyev.android.calculator.jscl.JsclOperation;
 
 /**
  * User: serso
@@ -27,6 +26,17 @@ public class ToJsclTextProcessorTest {
 	public void testProcess() throws Exception {
 		final ToJsclTextProcessor preprocessor = new ToJsclTextProcessor();
 
+		Assert.assertEquals( "", preprocessor.process("").toString());
+		Assert.assertEquals( "()", preprocessor.process("[]").toString());
+		Assert.assertEquals( "()*()", preprocessor.process("[][]").toString());
+		Assert.assertEquals( "()*(1)", preprocessor.process("[][1]").toString());
+		Assert.assertEquals( "(0)*(1)", preprocessor.process("[0][1]").toString());
+		Assert.assertEquals( "(0)*(1*10^)", preprocessor.process("[0][1E]").toString());
+		Assert.assertEquals( "(0)*(1*10^1)", preprocessor.process("[0][1E1]").toString());
+		Assert.assertEquals( "(0)*(1*10^-1)", preprocessor.process("[0][1E-1]").toString());
+		Assert.assertEquals( "(0)*(1.*10^-1)", preprocessor.process("[0][1.E-1]").toString());
+		Assert.assertEquals( "(0)*(2*10^-1)", preprocessor.process("[0][2*E-1]").toString());
+		Assert.assertEquals( "(0)*log(1)*(2*10^-1)", preprocessor.process("[0]ln(1)[2*E-1]").toString());
 		Assert.assertEquals( "sin(4)*asin(0.5)*sqrt(2)", preprocessor.process("sin(4)asin(0.5)sqrt(2)").toString());
 		Assert.assertEquals( "sin(4)*cos(5)", preprocessor.process("sin(4)cos(5)").toString());
 		Assert.assertEquals( "3.141592653589793*sin(4)*3.141592653589793*cos(sqrt(5))", preprocessor.process("πsin(4)πcos(√(5))").toString());